Buggy code:
public class ArchiveTool { private ToolConfig config ; private Store store ; private PrintStream report ; public ArchiveTool ( Store store , ToolConfig config ) { } public ArchiveTool ( Store store , ToolConfig config , PrintStream report ) { } public static void main ( String [ ] args ) throws IOException , ParseException { } public void run ( CommandLine cmd ) { } private void displayError ( String message , String [ ] args ) { } private void displayError ( String message , String [ ] args , Exception e ) { } private void displayError ( String title , List < String > errors ) { } private void list ( CommandLine cmd ) { String [ ] args = cmd . getArgs ( ) ; boolean showErrors = cmd . hasOption ( SHOW_ERRORS . display ( ) ) ; List < String > errors = new ArrayList < > ( ) ; switch ( args . length ) { case 1 : report . println ( "Collections:<seq2seq4repair_space>" ) ; try { String [ ] collectionNames = store . listBookCollections ( ) ; for ( String name : collectionNames ) { report . println ( ( "<seq2seq4repair_space>" + name ) ) ; } } catch ( IOException e ) { displayError ( "Error:<seq2seq4repair_space>Unable<seq2seq4repair_space>to<seq2seq4repair_space>read<seq2seq4repair_space>collection<seq2seq4repair_space>names." , args , e ) ; } break ; case 2 : report . println ( ( "Books<seq2seq4repair_space>in<seq2seq4repair_space>" + ( args [ 1 ] ) ) ) ; try { String [ ] books = store . listBooks ( args [ 1 ] ) ; for ( String name : books ) { report . println ( ( "<seq2seq4repair_space>" + name ) ) ; } } catch ( IOException e ) { displayError ( ( ( "Error:<seq2seq4repair_space>Unable<seq2seq4repair_space>to<seq2seq4repair_space>read<seq2seq4repair_space>book<seq2seq4repair_space>names<seq2seq4repair_space>in<seq2seq4repair_space>collection<seq2seq4repair_space>[" + ( args [ 1 ] ) ) + "]" ) , args , e ) ; } break ; case 3 : report . println ( ( ( ( "Stuff<seq2seq4repair_space>in<seq2seq4repair_space>" + ( args [ 1 ] ) ) + ":" ) + ( args [ 2 ] ) ) ) ; try { <START_BUG> Book book = store . loadBook ( args [ 1 ] , args [ 2 ] , errors ) ; <END_BUG> if ( book != null ) { for ( String item : book . getContent ( ) ) { report . println ( ( "<seq2seq4repair_space>" + item ) ) ; } } else { report . println ( ( ( ( ( "Failed<seq2seq4repair_space>to<seq2seq4repair_space>read<seq2seq4repair_space>book.<seq2seq4repair_space>[" + ( args [ 1 ] ) ) + ":" ) + ( args [ 2 ] ) ) + "]" ) ) ; } if ( showErrors && ( ! ( errors . isEmpty ( ) ) ) ) { displayError ( "Errors:<seq2seq4repair_space>" , errors ) ; } } catch ( IOException e ) { displayError ( ( ( ( ( "Error:<seq2seq4repair_space>Unable<seq2seq4repair_space>to<seq2seq4repair_space>load<seq2seq4repair_space>book<seq2seq4repair_space>[" + ( args [ 1 ] ) ) + ":" ) + ( args [ 2 ] ) ) + "]" ) , args , e ) ; } break ; default : displayError ( "Too<seq2seq4repair_space>many<seq2seq4repair_space>arguments.<seq2seq4repair_space>USAGE:<seq2seq4repair_space>list<seq2seq4repair_space>[-options]<seq2seq4repair_space><collectionId><seq2seq4repair_space><bookId>" , args ) ; break ; } if ( ( ! showErrors ) && ( ! ( errors . isEmpty ( ) ) ) ) { report . println ( ( "\nErrors<seq2seq4repair_space>were<seq2seq4repair_space>found<seq2seq4repair_space>while<seq2seq4repair_space>processing<seq2seq4repair_space>the<seq2seq4repair_space>command.<seq2seq4repair_space>Use<seq2seq4repair_space>the<seq2seq4repair_space>-showErrors<seq2seq4repair_space>flag<seq2seq4repair_space>" + "to<seq2seq4repair_space>display<seq2seq4repair_space>the<seq2seq4repair_space>errors." ) ) ; } } private void check ( CommandLine cmd ) { } private void update ( CommandLine cmd ) { } private void updateImageList ( CommandLine cmd ) { } private void cropImages ( CommandLine cmd ) { } }

Fix:
Book book = store . loadBook ( store . loadBookCollection ( args [ 1 ] , errors ) , args [ 2 ] , errors ) ;